Is 301 redirects enough for RSS feeds, or will some readers fail?

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http://serverfault.com – I am in the process of moving an entire site from ID based pages to user friendly / descriptive urls, and I would like to move the blogs as well. My problem is then, that I am uncertain if 301 redirects will be enough to be completely covered, as I am not sure if all readers support these, and I do not want to loose any subscribers if I can help it. For regular HTML pages there is the canonical "redirect", telling google and others, that the url is moved, but the old url is still valid, but I can not find a similar functionality for blogs. Does such a feature exist, or is 301 really going to (HowTos)